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Finding the Fourth Proportional to 326,748.80, 490,153.48 and 127,084.21

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Solution

The fourth proportional to 326,748.80, 490,153.48 and 127,084.21 is: 190,638.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,748.80 : 490,153.48 = 127,084.21 : x
  2. Step 2: Convert to fraction form
    326,748.80/490,153.48 = 127,084.21/x
  3. Step 3: Cross multiply
    326,748.80x = 490,153.48 × 127,084.21
  4. Step 4: Simplify right side
    326,748.80x = 62,290,766,241.46
  5. Step 5: Solve for x
    x = 62,290,766,241.46/326,748.80
  6. Step 6: Final answer
    x = 190,638.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.